Finding the Fourth Proportional to 100,413.18, 138,456.57 and 64,065.99
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Solution
The fourth proportional to 100,413.18, 138,456.57 and 64,065.99 is: 88,338.57
Step by Step Solution
- Step 1: Write the proportion equation
100,413.18 : 138,456.57 = 64,065.99 : x - Step 2: Convert to fraction form
100,413.18/138,456.57 = 64,065.99/x - Step 3: Cross multiply
100,413.18x = 138,456.57 × 64,065.99 - Step 4: Simplify right side
100,413.18x = 8,870,357,229.05 - Step 5: Solve for x
x = 8,870,357,229.05/100,413.18 - Step 6: Final answer
x = 88,338.57
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.